Cloudy weather and slow growth

There has been very little sun in June. Sun does come out once in a while, it's not a total cloud cover. However, most days this past week sun was either too early in the morning or too late in the evening to hit the sequoias. There was probably total of 6 hours entire week with direct illumination. The direct result is even slower growth than previous week. Almost two more inches of rain fell, mostly during one strong storm.

Despite overall just 0.5" growth, a few samples did very well. Most notably, the lead #34 added very robust 1.5" in one week:

#34 June 21, 2015

Since the leader copes well with removal of the dead branches given environmental conditions, which is witnessed by no serious fungus or other deceases, all other samples (except #15) will be also trimmed today.

#38 continues to grow steadily but not exceptionally better than those in containers. So far predictions that it will outgrow other plants quickly did not materialize. However, at this time it added largest height (7.75") since winter. I also measured circumference of the main trunk just above the large knot above ground using tailor's measuring tape, 4.5cm (note, measured in cm, not inches):

#38 June 21, 2015

#65 "grew" 1.5", but it was mostly bending of the branches following the sun and somewhat poor measurement technique caused by its location (difficult to look parallel to the level during measurement):

#65 June 21, 2015

The table shows that it remains about 9-10" tall for the past month or so.

#15 starts to look like it's really adding both volume and height, shaking severe winter damage off:

#15 June 21, 2015. Adding volume fast after winter damage

Edit:
I got three new germinations. This time I added about a pound of sand and a handful of mulch to the mixture in 3" container (in addition to the normal "cactus mix"). A 3" container was filled to about 3" below the rim with this slightly modified mix. Top 2" were filled with the regular starter mix mixed with water. I put all three germinated seeds in one container because that's average survival rate:

All trees were trimmed off dead branches. CA1 looks like this now: